your connection to the internet and the university will be interrupted on Saturday, September 28 2019, from around 7:00 to approx. 12:00.

The reason is the shutdown of the transformer station Lessingstraße 45. Urgent maintenance will be performed.

To our knowledge electrical power to the dormitory itself will remain.

Greetings
Your AG StuNet

on Monday, September 02 2019, at 12:08, it came to an interruption of network connectivity for all dormitories. We were able to quickly diagnose it to be a bigger problem, which also affected the university.

When contacting the computation center, we learned that an excavator damaged a power line and data cables to Karl-Kegel-Bau. We were not given an estimated time to recovery.

Fortunately the computation center was able to restore connectivity at 14:20, so that our users can access the internet again without problems.

If you are interested in computer networks, linux server, system administration or supporting users, then feel free to contact us. Everyone can work with us at StuNet and bring his/her ideas to make the network a bit better.

Greetings
Your AG StuNet

We received more reports in recent weeks about faulty IP address assignment to user systems. The error has now been detected and corrected.The IP address assignment via DHCP is handled by two systems which dynamically divide the available addresses among each other. Thus, addresses can still be distributed if one of the systems fails. Unfortunately, due to a configuration error on our part, the communication between the systems was interrupted, which prevented the systems from exchanging available addresses. This caused a system to run out of available IP addresses and it did not respond to requests from user systems.We apologize for the problems and thank the users who reported the problem.

If you are interested in computer networks, linux server, protocols or supporting users, then feel free to contact us. Everyone can work with us at StuNet and bring his/her ideas to make the network a bit better.

Greetings
Your AG StuNet

in this semester we will again offer a consultation.

On Monday the 1st October you find us in the basement of the dormitory Agricolastraße 16 next to the caretakers office. From 10am to 2pm you can give us the form you received from the dormitories' administration. Don't forget to fill in your university login name. You can bring us the guest login forms, too, of course. Both forms have to be signed and stamped by the student services!

Please note, that we can not offer extra consultations in the other dormitories, so everyone should use this consultation. Of course you can also ask us questions related to the internet connection in the dormitories.

If you are interested in computer networks, linux server, protocols or supporting users, then feel free to contact us. Everyone can work with us at StuNet and bring his/her ideas to make the network a bit better.

Outside of the consultation time you can reach us during our Admins normal opening hours or via mail to admin(at)stunet.tu-freiberg.de. Please note, that the opening hours might not be correct, because some Admins might still be on holiday. :)

Greetings
Your AG StuNet

Necessary security updates will be installed in this period.

The University Computer Center asks for your understanding.

Your AG StuNet

This is to prevent malicious network devices from interfering with the rest of the network, as well as intercepting user configuration errors.

This tentative change will take place around 12:00 and will probably only take a few minutes. Users do not have to change settings in their devices.

If the conversion succeeds, the other dormitories will follow shortly.

in this semester we will again offer an extra consultation.

On Monday the 2nd and Wednesday the 4th October you find us in the basement of the dormitory Agricolastraße 16 next to the caretakers office. From 10am to 2pm you can give us the form you received from the dormitories' administration. Don't forget to fill in your university login name. You can bring us the guest login forms, too, of course. Both forms have to be signed and stamped by the student services!

Please note, that we can not offer extra consultations in the other dormitories, so everyone should use this consultation. Of course you can also ask us questions related to the internet connection in the dormitories.

If you are interested in computer networks, linux server, protocols or supporting users, then feel free to contact us. Everyone can work with us at StuNet and bring his/her ideas to make the network a bit better.

Outside of the consultation time you can reach us during our Admins normal opening hours or via mail to admin(at)stunet.tu-freiberg.de. Please note, that the opening hours might not be correct, because some Admins might still be on holiday. :)

Greetings
Your AG StuNet

many of you have noticed the network problems in the last two days. Some of you also contacted us. We want to explain the problems with this message.

We had problems with our user management. To prevent failures we use two systems which can take over in case the other system fails. On Thursday we wanted to upgrade our systems. Because of the redundancy we didn't expect an outage, so we did not make an announcement for the upgrade. During the upgrade one of the two systems is down for being upgraded and the other one has to serve all the requests on our network, so there is not redundancy for the duration of the upgrade.

Unfortunately, a grave system error happened on the only active system. Because we needed three hours to upgrade the first system we didn't recognise the network outage immediately and so the network was down for all StuNet users.

After spending one more hour we could restore the network access for registered users. The registration of new devices was still not possible because we couldn't find the problem instantly. On Friday we upgraded the second system. Afterwards the registration was possible again.

We hope the outage did not cause too much trouble for you and we apologize for the inconvenience.

Best regards
Your StuNet team

On Saturday December 3^rd 2016 from 7 a.m. to 2 p.m. facility management of the university will shut down energy connection of the area Lessingstraße 45. This effects the fiber optic cable connecting the dormitory Heinrich-Heine-Straße 11 which may lead to network interruptions.

Thank you for your understanding.

Best regards.

Your StuNet

the university computing center let us know that they will be replacing data cabinets on Friday (November 11th), beginning at 2pm. This also affects the uplink of StuNet. While we expect no degradation in service for our users, complications can not be ruled out completely. The service technicians are doing their best to keep possible downtimes to a minimum.

Best regards
Your StuNet

in this semester we will again offer an extra consultation.

On Saturday the 1st and Thursday the 4th October you find us in the basement of the dormitory Agricolastraße 16 next to the caretakers office. From 10am to 2pm you can give us the form you received from the dormitories' administration. Please fill in your university login name an do not forget your rent contract. You can bring us the guest login forms, too, of course.

Please note, that we can not offer extra consultations in the other dormitories, so everyone should use this consultation. Of course you can also ask us questions related to the internet connection in the dormitories.

If you are interested in computer networks, linux server, protocols or supporting users, then feel free to contact us. Everyone can work with us at StuNet and bring his/her ideas to make the network a bit better.

Greetings
Your AG StuNet

Im Folgenden findet ihr bekannte Probleme und entsprechende Lösungen. Bei weiteren Fragen könnt ihr uns natürlich per Mail kontaktieren oder persönlich bei einem Admin um Rat bitten.

Mögliche Probleme und Lösungen

Unsere Erfahrungen bisher haben gezeigt, dass falsche Netzwerkeinstellungen oder die Verwendung von Kaspersky Anit-Virensoftware Probleme bereiten können.

Bitte stellt euer Gerät am Anschluss so ein, dass die IP-Adresse und die DNS-Adresse automatisch bezogen werden (manchmal auch als dynamische IP oder DHCP bezeichnet). Normalerweise sind die Geräte standardmäßig so eingestellt. Bei Problemen befindet sich eine Anleitung unten unter Links.

Wir haben aktuelle Kaspersky Versionen zum Download bereitgestellt, mit welcher keine Probleme im StuNet bestehen. Diese sind in Deutsch derzeit noch nicht auf der Homepage von Kaspersky verfügbar und wurden uns vorab vom Kaspersky Support zur Verfügung gestellt. Kaspersky empfiehlt das Beenden von Kaspersky, eine Deinstallation unter Beibehaltung der Einstellungen, einen Neustart und die Installation der neuen Version. Wir hatten aber keine Probleme damit, die Installation direkt auch ohne eine vorherige Deinstallation durchzuführen (also ein Ersetzen/Update der alten Version). Die neuen Versionen findet ihr unten unter Links.

You can not open the login page?

• Open the login site https://login.stunet.tu-freiberg.de/ directly
• Please try another browser and disable your browser add-ons and extensions
• If your using a router try to login from another device
• Be sure to obtain your IP automatically (DHCP; see link below)

Problems associated with a router

• Restart the router
• Configure the router to get an dynamic IP (via DHCP) and obtain DNS automatically, you can find some instructions for TP-Link here
• If necessary reset the router and setup it again

Problems related to Kaspersky antivirus software

Kaspersky seems to block our login site. Disabling Kaspersky does not solve the problem. If you are using a router try to login from another device without Kaspersky first, for example your Smartphone.

Be sure to use the latest Kaspersky version (see links below). 

If you have another problem or further questions, please contact us or visit an admin.

This week we will finally launch our new login system. For that matter we would like to give you some advice so the transition to the new system will be as smooth as possible.

On Wednesday between 9:30am and 11am all users will be disconnected, resulting in your devices logging in to StuNet again automatically. Users who use a router to connect to StuNet can of course keep using their router like they did before. In that case, the login should be done on the computer connected to the router via LAN/WLAN.

The login will take place completely in the browser. As soon as you try to access a website, a login mask will appear. If you cannot use the internet anymore or if the login page does not show up automatically please open login.stunet.tu-freiberg.de.

Soon we will be finishing our construction work of the last few weeks. Because of our new devices our main network components are now redundant. Should there be any breakdowns they will not affect the internet use anymore. Furthermore we were able to improve the quality of the connection to the different dormitories and network segments.

We know that network outages of such severity are very annoying. We have been increasing our efforts since mid last year to improve the resilience of our core network components.

In the coming weeks, we will restore the redundant connection to the university computing center, replace the old router in Winklerstraße 22 and deploy a new, completely redundant core network. Its structure is designed so no failure of a single optical fibre or core network component can result in an outage for our users.

I will now describe the cause of this weeks problems: For monday we had announced short network interruptions on our website and we had posted notices in the respective buildings. We wanted to update the network components in Winklerstraße to the newest software, so we would be able to restore the redundant connection to the university computing center. The URZ replaced their routers last year which meant we could no longer continue to use the "RIP" routing protocol. Everything worked as planned - there were two short network outages of less than five minutes. However, we also had to change the partition layout for the one of the upgrades, i.e. the way data is stored on the hard drives. All systems in StuNet store their data on at least two different hard drives simultaneously ("RAID"), so these kind of changes can be done online without interruption of the service. But when we rebootet the access router in Winklerstraße 22 on Tuesday to complete the upgrade, the system could no longer boot. Apparently the tool "resize2fs" had damaged the partition in a way that it was no longer readable by the bootloader (the operating system was unaffected). We are prepared for these kinds of problems, but none of the two USB sticks we brought could be used to boot the rescue system. We had brought a CD as well but with an incompatible version (64bit instead of 32bit). We should have checked beforehand, but we simply did not expect both USB sticks to fail. So we had to find an internet-connected PC with a CD burner and a blank CD before we were able to boot our rescue system, create the partitions from scratch and copy of the data to restore the system to a usable state.

Unfortunately, our problems did not end there. On Tuesday and Wednesday we noticed the fibre optics interfaces were going offline in irregular intervals for several seconds. We were finally able to locate the problem in a newer version of the driver for our Intel cards and hopefully everything is now working again as you have come to expect it from us.

Regards
AG StuNet

We are very happy to be able to focus on more important things now: Improve the reliability of the network and enable users to sign up using the university username instead of the often-mistyped mac addresses.

Best regards
AG StuNet

Repairing the old AC was not an option economically so we made a virtue of necessity and upgraded the room in the basement of Agricolastraße 16 and we now have enough space to install our systems in an accessible and well air-conditioned fashion.

The move is almost done, we just have to introduce the fiber optics cables into the new rack. This will result in interruption of the internet connectivity

on Saturday, March 5th 2016
between 10am and 12am.

Best regards
AG StuNet

Important: We need your help if you want to improve the network of StuNet. Maybe you can help with public relations so we can inform our users faster and better? Or you are interested in network maintenance so we can be sure there is always someone in Freiberg when a failure occurs?

Best regards
AG StuNet

Christmas is coming soon, but we have a little present for you today. Maybe you noticed it already. We have raised the transfer volume to 100 GB per month and user.

We like to adapt it to the conditions of increasing amount of data in daily and especially scientific use of Internet without supporting large downloads with high transfer rates.

The StuNet team wishes you a wonderful Christmas time.

after some preparation we could finally bring the new access router online. This caused a downtime of about 30 minutes, but we hope the improved network quality will make up for this inconvenience. Please let us now if you still experience problems - but our first tests make us confident that we now have enough "wiggle room" to provide you with a high quality network even during peak times.

Important: We need your help if you want to improve the network of StuNet. Maybe you can help with public relations so we can inform our users faster and better? Or you are interested in network maintenance so we can be sure there is always someone in Freiberg when a failure occurs?

Best regards
AG StuNet

Please report continuing problems to get an better overview.

Important: We need your help if you want to improve the network of StuNet. Maybe you can help with public relations so we can inform our users faster and better? Or you are interested in network maintenance so we can be sure there is always someone in Freiberg when a failure occurs?

Best regards
AG StuNet

due to unannounced maintenance by the URZ the uplink of Heinrich-Heine-Str. 11 was interrupted this morning for about 30 minutes. We apologize for the inconvenience.

Best regards
AG StuNet

unfortunately the rooms in Alte Mensa did not have internet connectivity today between 12:45 and 16:45 due to the flawed configuration of a router which was unfortunately not detected automatically. We are sorry for any inconvenience this has caused you.

Important: We need your help if you want to improve the network of StuNet. Maybe you can help with public relations so we can inform our users faster and better? Or you are interested in network maintenance so we can be sure there is always someone in Freiberg when a failure occurs?

Best regards
AG StuNet

Wednesday evening at about 18:30 there was an outage at the university's computing center (URZ) which cause the internet connection of the whole university to fail. A large part of the campus was reconnected in the morning of Thursday. Unfortunately the outage had corrupted settings that are necessary for the connection between StuNet and thre rest of the campus. This problem was only diagnosed on Friday. We worked together with the URZ to restore the settings and all student residences should be back online.

We are very sorry for this disruption but unfortunately there is nothing we can do when the university network fails.

Important: We need your help if you want to improve the network of StuNet. Maybe you can help with public relations so we can inform our users faster and better? Or you are interested in network maintenance so we can be sure there is always someone in Freiberg when a failure occurs?

Best regards
AG StuNet

yesterday (11.03.) we had a hardware defekt which resulted in a internet interruption for the student dormitory Winklerstraße 20 until today 12:00.

We are sorry for any inconvenience this has caused you.

Also we would like to report a planed network outage of the university network at Friday the 14.03. from 4:30 to 7:00 because of maintenance work at the DFN hub. (see URZ failuralert for the failualert report from the URZ)